Syzygy endgame tablebases

Invalid position

The given position is not a legal chess position.

Histogram: KQBB winning vs. KQB (log scale)

Longest KQBBvKQB phases

KQBBvKQB statistics (unique positions)

White wins:
175,007,790,234 (45.1%)
Frustrated white wins:
93,584,766 (0.0%)
Draws:
140,753,993,791 (36.2%)
Frustrated black wins:
567,262,676 (0.1%)
Black wins:
71,918,655,023 (18.5%)
KQBBvKQB.json (?)

KQBBvKQB dependencies

To probe all KQBBvKQB positions, these tables and their transitive dependencies are also required:

KQBvKBB · KQBBvKB · KQBvKQB · KQBBvKQ

KQBBvKQB.txt KQBBvKQB.dot